Im stumped, fish dying!

Question
Will,

Good Morning, I am having an issue with a small ten gallon tank that I keep in my office. The fish (hi-fin platy's, rosy barbs, and then mollies) continue to perish within a day of being put in the tank. within 4 hours they are showing signs of stress. I have been putting a few fish in to cycle the tank. Sadly they die, I clean everything, put the next batch in and so forth, this has happened three times. Here is the irony, I am an expert aquarist. I maintain 8 tanks, I raise african cichlids, gold severums, cold water trout, 150g reef/40g refuge and my pride and joy MONSTER FISH! This is why I am asking you. I keep arowana, gar, oscars, and my expertise is in large carnivorous catfish, redtails, tiger shovel nose, pacamon, asian red tails, channels, hybrids, etc. I am the laughing stock of my friends, I can not keep fresh water fish alive in a 10 gallon tank for more than a day. I need ideas that are outside the box on this one. I have tested the water, brought water from other tanks, used media from other tank filters, cleaned substrate and decor in tank water. These poor 2 dollar fish are dying because of something. Any suggestions would be appreciated. I need my friends to stop laughing!

Answer
Hi,
We have a lot in common with the monster fish thing. If you read my profile, you probably know I love arowana, rays, cichlids, all that good stuff.

Being that you have a lot of experience and you said you have checked the water I'm going to assume that's fine. I have to ask this question just because it's bothering me. Did you use de-chlorinator? Most people say stress coat doesn't work, but it works VERY well in my opinion. You may want to try some. My guess is because it's an office building they have all kinds of chlorine, chlorides and that type of thing.

This is extremely radical, but I actually "farm" fish for my own use, not to sell them, because fish farms are notorious for inbreeding and adding chemicals and other things that make the fish drugged to "enhance" the fish and keep them alive in shipping. This will kill them very quickly when acclimated to a home (or office) aquarium.

I'm not saying fish farms are bad, I'm very close friends with many farm owners and I trust most of the U.S. and Australian farms to not use "enhancers" and provide top quality livestock. Hope this makes sense and helps.